time calculate formula

Kumar Gaurav (Going...to be C.A soon...)   (1624 Points)

17 January 2009  

hi,,,,,

pls. help me how to calculate time difference in excel sheet suppose i have to calculate the diff between

10:00 to 10:40 then??????

10:00 to 11:40 then ?????

i want the diff. in minutes onlyyyyyyy

plzzzzzzzzzzzzz